JP2016138448A - Surface finishing method for base material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a surface of a base material to be provided with a joint-like pattern having a tiled texture, while maintaining strength of the base material such as a precast panel.SOLUTION: A surface finishing method for a base material includes a cement-based material layer forming step of forming a cement-based material layer on a surface of the base material by placing a cement-based material in a fluid state on the surface, and a joint-like pattern engraving step of engraving a groove part with a joint-like pattern on a surface of the cement-based material layer, while preventing the base material from being shaved.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a surface finishing method for a base material in which a joint pattern imitating joints such as tiles is provided on the surface of the base material such as a cement composition.

  Conventionally, a design panel is known as a panel that enhances the design of an outer wall of a building. This design panel is formed by, for example, attaching a tile, stone, brick, or the like (hereinafter collectively referred to as “tile”) to a cement composition such as a precast panel with a mortar, an adhesive, or the like.

  Instead of such a panel, recently, a grid-like groove portion is provided in advance on the surface of a precast panel, and the groove portion is colored like a joint portion and finished to resemble a tile.

JP 2000-38826 A

  However, the above-mentioned precast panel directly forms a lattice-like groove portion that looks like a joint portion on the surface of the panel itself. That is, since the precast panel itself has a defective portion, there is a problem of a decrease in strength of the panel itself.

  The present invention has been made in view of the conventional problems as described above, and can provide a tiled textured joint pattern on the surface of the substrate while maintaining the strength of the substrate such as a precast panel. It is an object to provide a possible substrate surface finishing method.

The main invention for achieving the above object is:
A cement-based material layer forming step of placing a cement-based material in a fluid state on the surface of the substrate to form a cement-based material layer on the surface;
A surface finishing method for a base material, comprising: a joint pattern engraving step for forming a groove portion of a joint pattern on the surface of the cement-based material layer with a joint cutting cutter.

  Other features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

  According to the present invention, it is possible to provide a tiled textured joint pattern on the surface of the substrate.

FIG. 1A is a plan view of the exterior panel 1 according to the first embodiment, and FIG. 1B is a BB arrow view in FIG. 1A. 2A to 2E are explanatory diagrams of the surface finishing method of the precast panel 2. FIG. 3A to 3E are explanatory views of the surface finishing method. FIG. 4A is a schematic side view of the state of engraving the groove 5m by the joint cutting cutter 40, and FIG. 4B is an explanatory view of the groove 5m without a coating of the self-leveling material 5s on the bottom 5ma. It is the table | surface which put together the variation of the exterior panel 1. FIG. 6A to 6E are explanatory diagrams of the surface finishing method of the main body 12 of the floor portion 11 formed by concrete placement at a construction site. 7A to 7E are explanatory views of the surface finishing method.

  At least the following matters will become clear from the description of the present specification and the accompanying drawings.

A cement-based material layer forming step of placing a cement-based material in a fluid state on the surface of the substrate to form a cement-based material layer on the surface;
A method for finishing a surface of a base material, comprising: a joint pattern engraving step for forming a groove portion of a joint pattern on a surface of the cement-based material layer with a joint cutting cutter.

In such a case, a cementitious material in a fluid state is cast on the surface of the substrate to form a cementitious material layer on the surface, and a groove portion having a joint pattern is formed on the surface of the cementitious material layer. Moreover, since a joint-like pattern is given to the base material based on the groove part engraved in the cement-based material layer, the base material can bring out a tiled texture.
Furthermore, since the groove portion of the joint pattern is engraved after the cement-based material layer is formed, the thicknesses of the tile-corresponding portions appearing as islands on the surface of the cement-based material layer as the remainder other than the groove portion are evenly aligned. As a result, the appearance of the joint pattern can be improved.
Further, since the groove portion of the joint pattern is formed after the cement-based material layer is formed, an arbitrary tile shape can be simulated by selecting the joint pattern. Therefore, it is good at design freedom.

A surface finishing method for such a substrate,
In the joint pattern engraving step, it is preferable to engrave the groove in the cement-based material layer so that the groove does not reach the base material.

  In such a case, since the groove portion does not reach the base material, the base material can be surely prevented from being shaved. As a result, the base material is not damaged, and the strength can be reliably maintained.

A surface finishing method for such a substrate,
The cementitious material is preferably a self-leveling material.

  In such a case, since the cement-based material is a self-leveling material, a cement-based material layer having a substantially flat surface can be formed simply by placing the self-leveling material on the surface of the base material. Therefore, the number of times of leveling the surface with scissors can be reduced and labor saving can be achieved. In addition, it becomes difficult for wrinkle unevenness to occur as the frequency of leveling decreases, which makes it easy to produce a tiled texture.

A surface finishing method for such a substrate,
Before placing the cement-based material on the surface of the base material, it is desirable to include a surface treatment step for performing a surface treatment for improving the adhesion between the base material and the cement-based material on the surface.

  In such a case, since the cement-based material is placed on the surface of the base material that has been subjected to a surface treatment that promotes adhesion to the cement-based material, the cement-based material layer formed by curing the cement-based material. Can be firmly fixed to the substrate.

A surface finishing method for such a substrate,
The cementitious material is a self-leveling material,
In the surface treatment step, it is preferable that a primer for a self-leveling material is applied to the surface of the base material as the surface treatment.

  In such a case, since the self-leveling material is placed on the surface of the base material after the primer for the self-leveling material is applied, the cement-based material layer formed by curing the self-leveling material is more firmly formed. It can be fixed to a substrate.

A surface finishing method for such a substrate,
The joint pattern is preferably a lattice pattern.

A surface finishing method for such a substrate,
The joint pattern is preferably a polygon or a circle excluding a lattice pattern.

A surface finishing method for such a substrate,
It is desirable that the base material is formed by placing a cement fluid on site.

  In such a case, a floor having a tiled texture can be constructed at the construction site. Further, at this time, the floor portion and the like are maintained without a cross-sectional defect, so that the durability of the floor portion and the like can be maintained for a longer time.

A surface finishing method for such a substrate,
The base material is preferably a floor.

A surface finishing method for such a substrate,
It is desirable to have a painting process of painting the cementitious material layer.

  In such a case, the cementitious material layer can be applied to the target tile color to be simulated, and thereby the texture of the tile can be further increased.

A surface finishing method for such a substrate,
Before placing the cement material on the surface of the substrate, it is desirable that the cement material is colored in advance.

  In such a case, since the cementitious material is pre-colored in a state of having fluidity before placing, the cemented material is simply placed on the surface of the base material by placing the cemented material and engraving the groove portion. The joint pattern of the target tile color to be simulated can be provided.

A surface finishing method for such a substrate,
It is desirable to apply a surface impregnation material or a clear paint to the surface of the cement material layer formed by curing the cement material.

  In such a case, since the surface of the cementitious material layer is covered with the surface impregnating material or the clear paint, it becomes difficult to get dirty.

A surface finishing method for such a substrate,
It is desirable to have a filling step of filling the groove with a joint material.

  In such a case, since the joint material is filled in the groove portion forming the joint pattern, the texture of the tile can be further increased.

=== First Embodiment ===
FIG. 1A is a plan view of an exterior panel 1 having a joint pattern according to the first embodiment. Moreover, FIG. 1B is a BB arrow line view in FIG. 1A.
The exterior panel 1 includes a precast panel 2 made of a concrete plate-like member as an example of a base material, and an outer layer integrally provided so as to substantially cover one surface 2a of the precast panel 2 in order to simulate tiling. Part 5.

  The outer layer portion 5 (corresponding to a cement-based material layer) is formed by placing a self-leveling material 5s (corresponding to a cement-based material) as an example of a cement-based material on the surface 2a of the precast panel 2 in a flowing state. The main body is formed by curing in a layered form. Then, on the substantially flat surface 5a of the outer layer portion 5, grooves 5m, 5m,... Imitating tile joints are engraved over a predetermined range. In the illustrated example, the predetermined range is the entire surface 5a, that is, grooves 5m, 5m,... Are engraved on the entire surface 5a in a joint pattern. However, the predetermined range may not be the entire surface, and may be a part of the surface 5a. Hereinafter, the groove portion 5m is also referred to as a joint equivalent portion 5m, and the remaining portion (portion remaining in an island shape) other than the groove portions 5m, 5m... On the surface 5a is also referred to as a tile equivalent portion 5t, 5t.

  Here, as shown in the partially enlarged view of FIG. 1B, the groove 5 m is cut only in the outer layer portion 5 and is not cut in the precast panel 2. That is, the groove 5m does not reach the precast panel 2, or even if it reaches, the surface 2a of the precast panel 2 is not shaved. Therefore, the surface 2a of the precast panel 2 is not damaged at all, and the panel 2 can maintain its strength.

  Desirably, the depth d5m of the groove portion 5m is set to be shallower than the thickness t5 of the outer layer portion 5, so that the bottom portion 5ma of the groove portion 5m is covered with the coating of the self-leveling material 5s as the material of the outer layer portion 5. It is good that it becomes the specification to be called. That is, it is preferable that the surface 5a of the precast panel 2 is not exposed at the bottom 5ma of the groove 5m. And according to the specification of such a groove part 5m, when forming the said groove part 5m in the outer layer part 5 by engraving, it is avoided reliably that the precast panel 2 is shaved, and the intensity | strength of the panel 2 is as mentioned above. Guaranteed reliably. The groove 5m is cut by a known device such as a joint cutting cutter 40 or the like. The joint cutting cutter 40 has, for example, a rotary blade that can move in one direction, and moves the rotary blade relative to the outer layer portion 5 to thereby cut the groove 5m along the moving direction to a predetermined cutting depth. It is formed at d40 (FIG. 4A).

  On the other hand, the joint-corresponding portion 5m, which is the groove portion 5m, is filled with a so-called real joint material 9 that is not a paint. That is, as the joint material 9, the same type of filler as that used in normal tiling is used. For example, fillers mainly composed of cement such as cement, mortar, and resin mortar are used. As a result, the joint-corresponding portion 5m is filled with the real joint material 9, so that the exterior panel 1 has the same texture as that of the real tile.

  Desirably, as shown in a partially enlarged view in FIG. 1B, the edge 5me of the groove 5m (that is, the boundary portion 5me between the tile-corresponding portion 5t and the groove 5m) is not covered with the joint material 9. It is good to do so. By doing so, the joint material 9 is not flush with the tile equivalent part 5t, but is dented from the tile equivalent part 5t, so that the joint material 9 is also suitable for the groove part 5m after filling. Shading is added to create a more tiled texture.

  Desirably, the edge 5me of the groove 5m is angular as shown in the enlarged view. And if it becomes like this, a shadow can be heightened similarly to the above-mentioned.

  The tile equivalent portion 5t is painted. That is, it is colored by the paint 7. The type of paint 7 is selected according to the type of tile to be simulated. For example, when imitating a stone tile, paint 7 mixed with stone powder is used, when imitating a brick tile, brick color paint 7 is used, and when imitating a metal tile, metal Color paint 7 is used.

  This coating may be applied only to the tile-corresponding portion 5t, or in addition to the tile-corresponding portion 5t, it may be applied to the groove 5m that is a portion other than the tile-corresponding portion 5t. When only the tile equivalent portion 5t is applied as in the former case, the coating material 7 may be applied while masking the groove portion 5m with a masking tape (not shown). And according to this, since the coating material 7 does not adhere to the groove part 5m, the adhesiveness to the groove part 5m of the joint material 9 which should be filled in the groove part 5m after painting can be improved. Incidentally, in the example of FIG. 1B, the groove 5 m is also painted with the paint 7.

  Such an outer layer portion 5 is formed of the self-leveling material 5s as described above. The self-leveling material 5s preferably has a flow value of 200 to 300 mm, particularly preferably 200 to 250 mm. The flow value of the self-leveling material 5s means a value measured by a method described in the Architectural Institute of Japan Standard JASS15M-103 “Quality Standard of Self-Leveling Material”. The self-leveling material 5s can be arbitrarily selected from various self-leveling materials such as cement-based self-leveling material, ceramic-based self-leveling material, gypsum-based self-leveling material, or resin mortar. These self-leveling materials are all known and are actually used. Cement-based self-leveling materials are mainly composed of cement (Portland cement, alumina cement, Irwin cement, etc.), sand (fly ash, river sand, sea sand, silica sand, limestone, etc.), and water, and optionally flows. Agent (naphthalic acid type, melamine sulfonic acid type, polycarboxylic acid type, aminosulfonic acid type, lignin sulfonic acid type, casein, etc.), sulfate (potassium sulfate, sodium sulfate, aluminum sulfate, etc.), phosphate ( Condensed phosphates, etc.), thickeners (polyacrylic acid, hydroxyethylcellulose, methylcellulose, etc.), antifoaming agents (silicon-based, nonionic surfactants, etc.) and the like are blended. The ceramic self-leveling material has a composition in which a part of the cement-based self-leveling material sand is replaced with a ceramic such as aluminum oxide, iron oxide, titanium oxide, silicon carbide and the like. The gypsum-based self-leveling material has a composition in which a part of the cement of the cement-based self-leveling material is replaced with gypsum. In order to manufacture the exterior panel 1 having the joint pattern of the present invention, it is preferable to use a cement-based self-leveling material. The flow value of the self-leveling material can be adjusted mainly by changing the water content, but the type of various components other than water, the properties (eg, sand particle size, shape, etc.), the blending amount, etc. It can also be adjusted by changing. In general, the self-leveling material is sold and supplied in a premixed state in which components other than water are blended, and when used, water necessary for obtaining a desired flow value is added and blended to obtain a self-leveling material.

The precast panel 2 is an extruded cement board (corresponding to a continuous molding material) such as ASRock (registered trademark) manufactured by Nozawa Co., Ltd., for example. That is, a panel obtained by kneading raw materials such as cement, a siliceous raw material, and a fibrous raw material and then extruding the raw material into a hollow plate with a predetermined direction as an extrusion direction and curing the autoclave. As shown in FIG. 2A, which will be described later, a plurality of trapezoidal grooves having a narrow surface 2a side and a wide depth side in the thickness direction are formed on one surface 2a of the precast panel 2 on the outer layer 5 side. 2b, 2b... Are provided on the surface 2a between adjacent trapezoidal grooves 2b, 2b in parallel with the trapezoidal groove 2b. Therefore, as shown in FIG. 2B, when the above-mentioned self-leveling material 5s is placed to form the outer layer portion 5 on the surface 2a, the self-leveling material 5s becomes trapezoidal grooves 2b, 2b,. The outer layer portion 5 formed by hardening the self-leveling material 5s is firmly fixed to the precast panel 2 as the extrusion-molded cement board 2 due to the anchor effect being effectively exhibited by entering.
Such trapezoidal grooves 2b and recesses 2c as groove-shaped anchor portions are formed continuously along the extrusion direction (the longitudinal direction of the precast panel 2 in FIG. 2A) when the precast panel 2 is extrusion molded. . Therefore, these trapezoidal grooves 2b and recesses 2c are also formed quickly when the precast panel 2 is extruded.

  By the way, in the case where the material is reinforced by containing a fiber raw material inside, as in the case of this extrusion-molded cement board 2, if a wrinkle enters the cement board 2 after forming, the fiber raw material is greatly cut off. There is a risk that the strength may decrease. Therefore, the specification of the groove portion 5m of the outer layer portion 5 described above, that is, the specification of the groove portion 5m that is not engraved in the precast panel 2, is particularly the extrusion cast cement plate 2 containing the fibrous raw material as the precast panel 2. Great effect when used.

  2A to 3E are explanatory views of the surface finishing method of the precast panel 2. FIG. 2A to 2E, there are a precast panel preparation step for preparing the precast panel 2 (corresponding to a base material preparation step), and an outer layer portion forming step for forming the outer layer portion 5 on the precast panel 2 (cement-based material layer). And a groove portion cutting step (corresponding to a joint pattern engraving step) in which a groove portion 5 m having a joint pattern is formed in the outer layer portion 5. 3A to 3E include a painting process for coating the outer layer part 5 in which the groove part 5m is engraved, and a joint material filling process for filling the joint material 9 in the groove part 5m (corresponding to a filling process). Is shown. Hereinafter, the surface finishing method will be described in detail with reference to these drawings.

  All the processes related to this surface finishing are performed at a factory, for example. First, as shown in FIG. 2A, a precast panel 2 corresponding to the outer shape of the exterior panel 1 to be molded is placed on a work table in a factory (not shown) with the surface 2a on which the trapezoidal groove 2b is formed facing upward. (Precast panel preparation step).

  Next, a mold frame 32 for forming the outer layer portion 5 is disposed on the precast panel 2 as shown in FIG. 2B. The formwork 32 is disposed so as to surround the peripheral edge of the precast panel 2. In the illustrated example, since the planar shape of the precast panel 2 is rectangular, the mold frame 32 has four side plates 32b, 32b... Arranged corresponding to each of the four sides of the precast panel 2.

  Then, the cement-based self-leveling material 5s in a fluid state is placed in the mold 32 from above. Then, after the cement-based self-leveling material 5s is cured, the mold 32 is removed, whereby the outer layer portion 5 is integrally formed on the surface 2a which is the upper surface of the precast panel 2 as shown in FIG. 2C (outer layer portion). Forming step).

  Incidentally, the cement-based self-leveling material 5s has a high self-diffusion property based on its high fluidity. Therefore, as shown in FIG. 2B, the self-leveling material 5s is simply placed on the surface 2a of the precast panel 2. The self-leveling material 5s spreads on the surface 2a by itself, and as a result, as shown in FIG. 2C, the outer layer portion 5 having a substantially flat surface 5a is naturally formed. Therefore, it is possible to reduce the number of times the surface 5a is leveled with scissors or dragonflies, and to save labor. In addition, it becomes difficult for wrinkle unevenness to occur as the frequency of leveling decreases, which makes it easy to produce a tiled texture.

  Next, as shown in FIGS. 2D and 2E, a groove portion 5m having a joint pattern is formed on the surface 5a which is the upper surface of the outer layer portion 5 (groove portion forming step). The engraved position of the groove 5m is a position where a joint pattern is desired to be formed when the exterior panel 1 is completed. For example, in the illustrated example, a plurality of groove portions 5m, 5m,... Are engraved so as to divide the surface 5a of the outer layer portion 5 into a lattice shape in order to simulate a rectangular large tile, but this is not a limitation.

  The engraving of each groove 5m is performed using, for example, the above-described joint cutting cutter 40. FIG. 4A shows a schematic side view of the state of engraving by the joint cutting cutter 40. Here, the cutting depth d40 of the joint cutting cutter 40 is slightly smaller (shallow) than the thickness 5t of the outer layer portion 5, for example. ) Is set. Thereby, the groove 5m to be engraved is formed only in the outer layer 5, and it is effectively avoided that the groove 5m reaches the precast panel 2 positioned below the groove 5m. That is, the precast panel 2 is not cut, and the panel 2 is maintained in a state free from defects. As a result, the strength is maintained high. Incidentally, the cutting depth d40 of the joint cutting cutter 40 may be set to the same value as the thickness t5 of the outer layer part 5, but in that case, the surface 2a of the precast panel 2 is jointed when the groove part 5m is engraved. It is desirable to perform the engraving work while paying close attention so as not to cut with the rotary blade of the cutter 40. And in that case, it replaces with the groove part 5m of the partially expanded view of FIG. 1B, and the groove part 5m as shown in FIG. 4B, ie, the groove part 5m without the film | membrane of the self-leveling material 5s, is formed in the bottom part 5ma. become.

  Then, as shown in FIG. 3B and FIG. 3C, the surface 5a of the outer layer part 5 in which the groove part 5m was carved is painted with the tile-colored paint 7 which should be simulated, and is colored (painting process). The coating method may be to spray the paint 7 with a spray 50 or the like, but may also be applied with a brush. Further, at the time of this coating, the bottom 5ma of each groove 5m may or may not be masked. If the bottom 5ma of the groove 5m is not masked, the masking operation can be omitted and the labor can be reduced. Here, in the latter case, that is, when the bottom portion 5ma of the groove 5m is not masked, it is desirable that the joint equivalent portion 5m which is a boundary portion between the tile equivalent portion 5t and the joint equivalent portion 5m which is the groove portion 5m. For example, not only the tile-corresponding portion 5t but also the groove portion 5m forming the joint-corresponding portion 5m may be coated so that the edge portion 5me and the vicinity thereof are not spilled.

  Thereafter, as shown in FIG. 3D and FIG. 3E, the joint material 9 mainly composed of cement is filled from above the paint 7 in each of the grooves 5m (joint material filling step). The filling 53 may be used for filling, so that the joint material 9 can be filled while slightly protruding from the groove portion 5m to the tile-corresponding portion 5t, and as a result, the groove portion 5m can be filled densely. Further, according to the collar 53, the joint material 9 that protrudes from the groove 5m and adheres to the tile-corresponding portion 5t can be easily removed by scraping. The joint material 9 adhered and remaining on the tile-corresponding portion 5t is finally wiped off by an appropriate wiping member such as a waste cloth. As a result, the paint 7 is exposed at the tile-corresponding portion 5t, and the joint material 9 is exposed at the groove portion 5m which is the joint-corresponding portion 5m. Thus, the joint-like pattern as shown in FIGS. 1A and 1B is obtained. The exterior panel 1 is completed.

  Desirably, a primer for cement-based self-leveling material is applied to the top surface 2a of the precast panel 2 before placing the cement-based self-leveling material 5s on the precast panel 2 in the outer layer portion forming step of FIG. 2B. It is good to apply. If it does so, the outer-layer part 5 which the said self-leveling material 5s hardens | cures can be fixed to the precast panel 2 more firmly through the improvement of the adhesive force to the precast panel 2 of cement-type self-leveling material 5s. As an example of the primer for this cement type self-leveling material, for example, a 3 to 6-fold diluted solution of an acrylic / styrene copolymer resin aqueous emulsion such as U primer G manufactured by Ube Industries, Ltd. may be mentioned. Examples of the method for applying the primer 8 include spraying with a spray, brushing, and the like.

  By the way, there are generally two types of tiled joint specifications: a thick joint with a wide joint width and a narrow joint with a narrow joint width. The joint width of the former thick joint is 5 to 8 mm, and the joint width of the latter fine joint is 1 to 3 mm. Therefore, in the above-described exterior panel 1, when simulating a thick joint, the groove 5m is engraved with a groove width of 5 to 8 mm. On the other hand, when simulating a fine joint, the groove 5m is 1 to 3 mm. Engraved with the groove width.

  Moreover, when simulating a fine joint, since the groove width of the groove part 5m is narrow, it becomes difficult to fill the joint material 9, but in that case, it is not necessary to fill. This is because, when the groove width is narrow, the bottom 5ma of the groove portion 5m is originally dark due to the difficulty of external light, so the narrow groove portion 5m imitating a fine joint does not need to be filled with the joint material 9. Because it can look dark like this.

  However, even in the case of a fine joint simulation in which the joint material 9 is not filled, it is preferable to mask the groove 5m in the painting process. Masking is performed, for example, by inserting a plate member having substantially the same thickness as the groove width into the groove portion 5m. And the outer layer part 5 is painted in this state. Incidentally, the reason for masking in this case is that the groove width of the groove portion 5m simulating the fine joint is as narrow as 1 to 3 mm, so that the coating film crosses the groove portion 5m due to the surface tension of the paint 7, etc. It is because there is a possibility of filling up.

  Of the four steps described above, the outer layer portion forming step and the groove engraving step are performed in the above-described factory, but the subsequent painting step and joint material filling step are not a factory but a building or the like. It may be performed at the construction site to be constructed. That is, while the precast panel 2 at the stage where the outer layer portion forming step and the groove engraving step are finished is carried into the construction site, the precast panel 2 is fixed to the frame wall surface of the building to be attached. 5 and filling of the joint material 9 may be performed.

  Moreover, in the above, the non-colored thing was illustrated as the self-leveling material 5s. That is, although the self-leveling material 5s having the original color (for example, gray) which is the original color of the self-leveling material 5s has been illustrated, the present invention is not limited to this. For example, you may use the self-leveling material 5s colored in the tile color which should be simulated beforehand in the fluid state before placement. By doing so, it is not necessary to coat the outer layer portion 5 after the self-leveling material 5s is cured. That is, the exterior panel 1 having a desired color can be provided only by placing the self-leveling material 5s. And thereby, shortening of manufacturing time and construction time can be aimed at.

  Such a coloring type self-leveling material is generated, for example, by mixing a color material such as a tile color pigment or dye to be simulated with a base material of the self-leveling material.

  However, when this colored type self-leveling material is used, the coating with the paint 7 is omitted, so that the antifouling effect of the outer layer portion 5 based on the coating cannot be expected. Therefore, when this antifouling property is required, a surface impregnating material or a clear paint may be applied to the outer layer portion 5. At this time, if a transparent material (preferably a colorless and transparent material) is used for the surface impregnating material or the clear paint, the color of the colored self-leveling material itself can be utilized. In addition, the execution timing of the application process of the surface impregnating material or the clear paint is the same as the above-described application process. Examples of surface impregnating materials include silane-based surface impregnating materials such as Magical Repeller (registered trademark) manufactured by Asahi Kasei Geotech Co., Ltd. and Aqua Seal (registered trademark) manufactured by Daido Paint Co., Ltd., NNC Corporation Examples include silicate-based surface impregnated materials such as Nano Consuper (registered trademark) manufactured by RC Shokai Co., Ltd. and RC Guard (registered trademark) manufactured by ABC Corporation. Examples thereof include a fluororesin clear such as 1100 clear and an acrylic silicon resin clear such as Ares Silicon Clear manufactured by Kansai Paint Co., Ltd.

  By the way, the table shown in FIG. 5 is a table summarizing those frequently executed in the various variations described above in association with the place of execution of each process (whether it is performed at the factory or at the construction site). That is, in the cell of the same table, the place where each step is performed is shown. In addition, the x mark in the cell means “not used” or “not implemented”.

  Incidentally, in the table of FIG. 5, in the case of the exterior panel 1 simulating the fine joints, the joint material 9 is not filled in the groove portions 5 m, but as described above, this table shows those that are frequently implemented. Therefore, if the joint material 9 can be filled in the groove portion 5m for simulating the fine joint, it may be filled. Similarly, in the same table, in the case of the exterior panel 1 simulating a thick joint, the joint material 9 is filled in the groove portion 5m, but it may not be filled in some cases.

=== Second Embodiment ===
6A to 7E are explanatory diagrams of a surface finishing method for the main body 12 of the floor portion 11 formed by placing concrete at a construction site. 6A to 6E, the floor body forming process (corresponding to the base material preparation process) for forming the body 12 of the floor 11 at the construction site, and the outer layer 5 being formed on the body 12 of the floor 11 are shown. The outer layer portion forming step (corresponding to the cement-based material layer forming step) and the groove portion engraving step (corresponding to the joint pattern engraving step) for engraving the groove portion 5m of the joint pattern in the outer layer portion 5 are shown. . Further, in the side views of FIGS. 7A to 7E, a coating process for coating the outer layer part 5 in which the groove part 5m is engraved, and a joint material filling process for filling the joint material 9 in the groove part 5m (corresponding to a filling process), Is shown.

  Hereinafter, the surface finishing method will be described in detail with reference to these drawings. The main difference from the first embodiment described above is that the base material of the first embodiment is the precast panel 2. On the other hand, the base material according to the second embodiment is the main body 12 of the floor portion 11 manufactured by cast-in-place concrete at a construction site such as a building. Therefore, points other than this are generally the same as those in the first embodiment described above, the same components are denoted by the same reference numerals, and description thereof is omitted.

  When the floor portion 11 is molded at the construction site, first, as shown in FIG. 6A, the formwork 25 is assembled on site in correspondence with the outer shape of the floor portion 11 to be formed. In the illustrated example, the mold 25 has a bottom plate 25a and four side plates 25b, 25b,... Arranged corresponding to the four sides of the bottom plate 25a. Then, the bar is placed in the mold 25, and concrete (corresponding to a cement fluid) is placed in the same mold 25 from above through the concrete supply pipe 60, and the upper surface 12a is flattened with scissors or the like. The cast concrete part 12 which is the main body 12 of the floor part 11 is formed (floor part main body forming step).

  Here, the upper surface 12a of the cast concrete portion 12 formed by hardening the concrete is flat. The upper surface 12a is a surface 12a on which the self-leveling material 5s for forming the outer layer portion 5 is placed in the outer layer portion forming step to be performed later. Therefore, prior to this placement, a surface treatment is performed on the upper surface 12a to increase the adhesion with the self-leveling material 5s (corresponding to a surface treatment step). Here, as the surface treatment, as shown in FIG. 6B, a primer 8 for cement-based self-leveling material is applied to the upper surface (surface) 12a. The primer 8 may be applied by spraying or the like, but may be brushed.

If it does so, the formwork 32 will be arrange | positioned in order to form the outer-layer part 5 on the upper surface 12a in which this primer 8 was coated. The formwork 32 is disposed so as to surround the peripheral edge of the placing concrete portion 12. In the illustrated example, since the planar shape of the placement concrete portion 12 is rectangular, the formwork 32 has four side plates 32b, 32b... Arranged corresponding to each of the four sides of the placement concrete portion 12. doing.
Then, a cement-based self-leveling material 5s in a fluid state is placed in the mold 32 from above as shown in FIG. 6C. And after hardening of this cementitious self-leveling material 5s, the formwork 32 is removed, and thereby, the outer layer portion 5 is integrally formed on the surface 12a which is the upper surface of the placing concrete portion 12 as shown in FIG. 6D ( Outer layer forming step).

  Next, as shown in FIG. 6D and FIG. 6E, a groove portion 5m having a joint pattern is formed on the surface 5a which is the upper surface of the outer layer portion 5 (groove portion forming step). The engraved position of the groove portion 5m is a position where a joint pattern is desired to be formed when the floor portion 11 is completed. In the illustrated example, the groove portion 5m is engraved so as to divide the surface 5a of the outer layer portion 5 into a lattice shape, but the present invention is not limited to this.

  The engraving of the groove 5m is performed using, for example, a joint cutting cutter 40, as in the first embodiment. Here, as shown in FIG. 4A, the cutting depth d40 of the joint cutting cutter 40 is set to be slightly smaller (shallow) than the thickness t5 of the outer layer part 5, for example. Thereby, the groove 5m to be engraved is formed only in the outer layer part 5, and it is effectively avoided that the groove 5m reaches the placing concrete part 12 positioned below the groove 5m. That is, the cast concrete part 12 is not cut once, and the cast concrete part 12 is maintained in a state without a defect, and as a result, its durability is maintained. Incidentally, the cutting depth d40 of the joint cutting cutter 40 may be set to the same value as the thickness t5 of the outer layer portion 5, but in this case, the surface 12a of the placing concrete portion 12 is formed when the groove portion 5m is cut. It is desirable to perform the engraving work while paying close attention not to cut with the rotary blade of the joint cutting cutter 40.

  Next, as shown in FIG. 7B and FIG. 7C, the surface 5a of the outer layer part 5 in which the groove part 5m is engraved is painted and colored with a tile-colored paint 7 to be simulated (painting process).

  Then, as shown in FIG. 7D and FIG. 7E, each groove portion 5m is filled with joint material 9 mainly composed of cement from the top of the paint 7 (joint material filling step). The floor portion 11 having the joint pattern as shown is completed.

  In the second embodiment as well, it is clear that the colored self-leveling material 5s can be applied, as in the case of the first embodiment described above, and the description thereof will be omitted.

  Further, the selection of the fine joints and the thick joints according to the joints of the tiles to be simulated and the setting of the groove width of the groove 5m are the same as in the first embodiment, and the description thereof is also omitted.

=== Other Embodiments ===
As mentioned above, although embodiment of this invention was described, this invention is not limited to this embodiment, The deformation | transformation as shown below is possible in the range which does not deviate from the summary.

  In the first embodiment described above, the precast panel 2 is exemplified as an example of a precast member having a joint pattern, but a precast columnar member or a precast beam member having a joint pattern is manufactured in the same manner. Also good.

  In the above-described embodiment, the case where the tile shape to be simulated is rectangular is illustrated. That is, the grid pattern is exemplified as the joint pattern, but the present invention is not limited to this. The tile shape to be simulated may be a polygon such as a triangle or a pentagon, or a circle such as an ellipse or a perfect circle. .

  In the first embodiment described above, for the purpose of strengthening the fixation between the precast panel 2 and the outer layer part 5, the trapezoidal groove 2b and the concave part 2c are provided on one surface 5a on the outer layer part 5 side in the precast panel 2. However, it is not limited to this. For example, instead of providing these trapezoidal grooves 2b and recesses 2c on the surface 2a, the surface treatment may be performed on the surface 2a. And even by this roughening, the adhesion between the self-leveling material 5s forming the outer layer portion 5 and the surface 2a of the precast panel 2 can be enhanced. Specific examples of roughening include water jet processing and sand blast processing. Moreover, you may use together the trapezoid groove | channel 2b and the recessed part 2c, and roughening. That is, roughening may be applied to the surface 2a of the precast panel 2 provided with the trapezoidal groove 2b and the recess 2c.

  In the first embodiment described above, an extruded cement board is exemplified as the precast panel 2, but instead of this, Spancrete (registered trademark) manufactured by Spancrete Corporation may be used. And this spun cleat is also manufactured in the form of a continuous molding material continuous in a predetermined direction. That is, this spun cleat is formed in a long shape along the same direction by gradually pouring concrete along a predetermined direction. Therefore, the long exterior panel 1 provided with the tiled textured joint pattern can be easily manufactured. Incidentally, in the case of this spun cleat, since the groove-like anchor portion along the same direction can be easily formed in the process of being continuously molded in a predetermined direction, the self-leveling material 5s and the spun cleat are firmly fixed. The exterior panel 1 can be manufactured relatively easily.

  Moreover, a lightweight cellular concrete board is also applicable as the precast panel 2 of 1st Embodiment. And since there are many small holes on the surface of this lightweight cellular concrete board, the self-leveling material 5s placed on the surface can be more firmly fixed to the lightweight cellular concrete board. In addition, you may apply | coat the primer 8 for cement-type self-leveling materials to the surface of a lightweight cellular concrete board.

  In the second embodiment described above, an example in which the cement-based self-leveling material 5s is placed by applying the primer 8 to the upper surface 12a of the flat placement concrete portion 12 placed at the construction site has been described. Not limited to this. For example, a formwork may be arranged to form a groove-like anchor portion on the surface 12a when placing concrete, or the surface 12a is roughened and the cement-based self-leveling material 5s is applied without painting the primer 8. May be installed.

  In the above-described embodiment, the trapezoidal groove 2b is described as an example of the groove-shaped anchor portion, but the surface 12a side is not necessarily narrow. For example, a groove having a rectangular cross section in which the widths of the opening side and the bottom side are substantially equal may be used.

  In the above-described embodiment, the coating process is performed after the groove engraving process, but the present invention is not limited to this, and the order may be reversed. That is, after the surface 5a of the outer layer portion 5 is painted with the tile color to be simulated, the groove portion 5m may be formed on the surface 5a of the painted outer layer portion 5.

  In the above-described embodiment, an example in which the joint material 9 is filled in the groove 5m has been mainly described, but the joint material 9 may not be filled in the groove 5m. In that case, for example, the groove 5m may be painted in a color different from the tile-corresponding portion 5t, or the ground color of the precast panel 2 or the cast concrete portion 12 may be exposed. Note that the exterior panel 1 and the floor 11 having a tiled texture can also be realized by painting the former groove 5m.

  In the above-described embodiment, the outer layer portion 5 is formed of the self-leveling material 5s. However, the present invention is not limited to this as long as it is a cement-based material that has fluidity at the time of casting and hardens after a predetermined time has elapsed. . For example, mortar (including color mortar) may be used, and more specifically, cement may be used.

In the above-described first embodiment, the concrete precast panel 2 is exemplified as the base material, but is not limited to concrete. For example, the cement of the precast panel 2 may not include one or both of coarse aggregate and fine aggregate. In other words, the base material may be made of mortar or cement other than concrete. Compositions are also applicable.
Furthermore, fiber reinforced cement boards (calcal boards, flexible boards, etc.), cement boards, gypsum boards, metal boards, wood boards, etc. are applicable as the base material.

  In the above-described embodiment, when the outer layer portion 5 is formed using the colored type self-leveling material 5s, the surface 5a of the outer layer portion 5 may be polished after curing depending on the case. And by giving this grinding | polishing, it is also possible to bring out the texture of a stone material etc., As a result, the design variation of the exterior panel 1 and the floor part 11 can be increased.

  In the above-described embodiment, the joint cutting cutter 40 is used to engrave the groove 5m. However, the present invention is not limited to this as long as the groove 5m can be engraved, and other engraving tools are used. May be.

1 exterior panel,
2 Precast panel (base material),
2a surface, 2b trapezoidal groove, 2c recess,
5 outer layer (cement-based material layer),
5m groove, 5a surface, 5ma bottom,
5me edge (boundary part),
5s Self-leveling material (cement-based material),
5t tile equivalent part,
7 paint, 8 primer, 9 joint material,
11 floor part, 12 placing concrete part (base material), 12a surface,
25 formwork, 25a bottom plate, 25b side plate,
32 formwork, 32b side plate,
40 joint cutting cutter, 50 spray, 53cm,
60 Concrete supply pipe

Claims (13)

A cement-based material layer forming step of placing a cement-based material in a fluid state on the surface of the substrate to form a cement-based material layer on the surface;
A method for finishing a surface of a base material, comprising: a joint pattern engraving step for forming a groove portion of a joint pattern on a surface of the cement-based material layer with a joint cutting cutter. A surface finishing method for a substrate according to claim 1,
In the joint pattern engraving step, the groove surface is engraved in the cement-based material layer so that the groove does not reach the substrate. A surface finishing method for a substrate according to claim 1 or 2,
The cementitious material is a self-leveling material. It is the surface finishing method of the base material in any one of Claims 1 thru | or 3, Comprising:
Before placing the cement-based material on the surface of the base material, the surface has a surface treatment step of performing a surface treatment for improving the adhesion between the base material and the cement-based material. Substrate surface finishing method. A surface finishing method for a substrate according to claim 4,
The cementitious material is a self-leveling material,
In the surface treatment step, as the surface treatment, a primer for a self-leveling material is applied to the surface of the base material. It is the surface finishing method of the base material in any one of Claims 1 thru | or 5, Comprising:
The method for finishing a surface of a substrate, wherein the joint pattern is a lattice pattern. It is the surface finishing method of the base material in any one of Claims 1 thru | or 5, Comprising:
The method for finishing a surface of a substrate, wherein the joint pattern is a polygon or a circle excluding a lattice pattern. It is the surface finishing method of the base material in any one of Claims 1 thru | or 7, Comprising:
A surface finishing method for a substrate, wherein the substrate is formed by placing a cement fluid on site. It is the surface finishing method of the base material in any one of Claims 1 thru | or 8, Comprising:
The base material surface finishing method, wherein the base material is a floor portion. It is the surface finishing method of the base material in any one of Claims 1 thru | or 9, Comprising:
A surface finishing method for a base material, comprising a painting step of painting the cement-based material layer. It is the surface finishing method of the base material in any one of Claims 1 thru | or 10, Comprising:
A surface finishing method for a substrate, wherein the cementitious material is colored in advance before the cementitious material is placed on the surface of the substrate. It is the surface finishing method of the base material in any one of Claims 1 thru | or 11, Comprising:
A surface finishing method for a substrate, wherein a surface impregnating material or a clear paint is applied to a surface of a cement material layer formed by curing the cement material. A surface finishing method for a substrate according to any one of claims 1 to 12,
A surface finishing method for a substrate, comprising a filling step of filling the groove with a joint material.